M4670_15 Datasheet, PDF (1/8 Pages) Unisonic Technologies – FITERLESS HIGH EFFICIENCY 3W SWITCHING AUDIO AMPLIFIER

UNISONIC TECHNOLOGIES CO., LTD
M4670
Preliminary
FITERLESS HIGH EFFICIENCY
3W SWITCHING AUDIO
AMPLIFIER
CMOS IC
 DESCRIPTION
The M4670 is a fully integrated single-supply, high-efficiency
Class D switching audio amplifier, and it can provide 3W of output
power. Containing adjustable output gain chip with micro-power
shutdown mode, the M4670 has innovative modulation schemes
that eliminate the output filter wave devices and thus reduces the
requirement of external components helping to streamline the circuit
design and reduce board area.
By using delta-sigma modulation technique which handles
incoming analog signal, the M4670 can reduce the output noise and
total harmonic distortion.
Operating on a single 5V supply, the M4670 can be a continuous
average output of 2.3W of power to driver the 4Ω speaker, and the
total harmonic distortion and noise (THD+N) are less than 1%. High
power conversion efficiency of the M4670 can drive a larger load
speaker that is respectively comparable to the typical Class AB
amplifier. Its can be used with a 3.6V, 600mW power supply to
driver an 8Ω speaker, while the efficiency is as high as 88%.
The M4670 has a high output power characteristics that makes it
ideal for ultra-high-power walkie-talkies, mobile phones, hands-free
intercom systems and applications.
 FEATURES
* Externally Configurable Gain
* No Output Filter Required for Inductive Loads
* Very Fast Turn on Time: 1.05ms (Typical)
* ‘Click and Pop’ Suppression Circuitry
* Micro-Power Shutdown Mode
* Short Circuit Protection
 ORDERING INFORMATION
Ordering Number
M4670G-K08-3030-R
Package
DFN-8(3×3)
Packing
Tape Reel
www.unisonic.com.tw
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